Furnace for burning ores



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FURNACE FOR BURNING ORBS. I No. 539,730. I Patented May 21, 1895.

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NITED STATES FFICE.

ATENT FURNACE FOR BURNING ORES.

SPECIFICATION forming part of Letters Patent No. 539,730, dated May21,1895.

Application filed August 7, 1894.

To all whom it may concern.-

Be it known that I, FREDnRrc J OHN FALD- ING, a citizen of the UnitedStates, residing at Cleveland, in the county of Ouyahoga and State ofOhio, have invented certain new and useful Improvements in Furnaces forBurning Ores; and I do hereby declare that the following is a full,clear, and exact description of the invention, which will enable othersskilled in the art to which it appertains to make and use the same.

My invention relates to improvements in furnaces for burning ore, andthe invention consists in the construction of a furnace substantially asshown and described and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a horizontal sectional View,in plan, on a line corresponding substantially to 1 1, Fig. 3, andshowing sets of ore-burning furnaces in two parallel series. Fig. 2 is avertical sectional elevation taken substantially on line 2, 2, Fig. 3,and disclosing especially the internal construction ofthe air orantiradiatin g jacket which envelops the furnace about its sides andends. Fig. 3 is a vertical cross-section, in elevation, of one of theseveral separate furnaces and a part of another at its side on a linecorresponding substantially to z 2, Figs. 1 and 2.

The foregoing views show the several furnaces, A, in each of theparallel series, as

seen in Fig. 1, and these furnaces each have individual doors a, gratebars b-, and discharge or flue openings .c in their top and rear,opening into a common passage or flue din the middle partition wall Dbetween the two series of furnaces.

I have found that there is an expensive waste of heat by absorption andradiation through the walls, when the old fashioned wall alone is used,and hence I have supplemented the solid wall E, which is the equivalentof the usual wall, with a jacketed wall or jacket, G, built up therewithat both the sides and the ends of the furnace. This jacket G iscomposed'of hollow fire brick, hollow tiles, or other suitable material,constructed and laid to form practically a continuous air jacket, and atthe same time afiording a series of parallel vertical air channels g.These air channels extend from the top to Serial No. 519,671. (Nomodel.)

the bottom of the furnace, and, preferably, are divided off as to theseveral furnaces in each series, so that each furnace has its ownsub-division ofthe said air channels. Thus, referring to Fig. 2, I see alongitudinal passage h along the top of the jacket with division walls kat intervals crossing and closing said passage. This wall is an outwardextension of the walls L located between the furnaces in each series,and also traverses the air passage Z at the bottom of channels -g. Thesaid airpassage Z- discharges at one end through the outlet m into thefurnace beneath the grate. Both the top passage -hand the bottom passageZ, parallel thereto, are common to all the vertical channels g+ for eachfurnace; and the top passage is designed to be in open communicationwith the outer air through the I opening 0- or its equivalent. Valve ordamper mechanism may be employed at the opening --0, or in the airpassages, to control or entirely out off the flow of air to eachfurnace.

By the foregoing construction of wall,I accomplish two objects, namely,the loss of heat by. radiation through thewalls of the furnace, and theheating of the air to supply combustion. In other words, the heat thatwould be lost by radiation is taken up by the inflowing air through theoutside jacket and delivered back to the furnace.

One or more separate furnaces may be built on this plan, and theconstruction of the fur nace or the use thereof is not material,provided that it be capable of taking this improvement.

A further advantage in the construction of this furnace is that the airchannels surrounding the burners can be arranged to permit the heatedair to escape into the atmosphere, and be replaced by cool air slowly,rendering it possible to diminish the temperature in the furnace; anarrangement which is of great value in burners when a certain degree ofheat is required to be maintained.

Having thus described my invention, what I claim is 1. An orefurnacehaving thefront wall thereof constructed with a series of hollow tilesarranged side by side in front of the fire brick and extending from thetop thereof down to a plane with the grate bars, the fire brick be- Iside vertically and an inlet passage for air to hind said tiles apassage common to all said said tiles and a dischargepassage forthe airtiles at their bottom and having an opening into the said furnacesbeneath the grate, subdischarging beneath the grates, and the frontstantially as set forth. [5 5 plate of the furnace in front of saidtiles, Witness my hand to the foregoing specifisubstantially as setforth. cation.

2. A set of ore furnaces having their fronts FREDERIO JOHN FALDING.

opposite to one another and a wall common to all said furnaces andseparating them at their Witnesses:

10 rear, and an outside Wall about the said fur- H. A. FRENCH,

naces consisting of hollow tiles placed side by J. H. O. MOQUILKIN.

